Given:
The system of equations:
To find:
The number that can be multiplied by the second equation to eliminate the x-variable when the equations are added together.
Solution:
We have,
...(i)
...(ii)
The coefficient of x in (i) and (ii) are 1 and 
respectively.
To eliminate the variable x by adding the equations, we need the coefficients of x as the additive inverse of each other, i.e, a and -a So, a+(-a)=0.
It means, we have to convert into -1. It is possible if we multiply the equation (ii) by -5.
On multiplying equation (ii) by -5, we get
...(iii)
On adding (i) and (iii), we get
Here, x is eliminated.
Therefore, the number -5 can be multiplied by the second equation to eliminate the x-variable.
So first make sure thtat the bottom number is the same so
7 and 3 and 2
multily them together and get 42
so multtiply 3/7 by 6/6 or 1=18/42
multiply 2/3 by 14/14=28/42
multply 1/2 by 21/21=21/42
18/42+28/42+21/42=(18+28+21)/42=67/42
simplify
1 and 25/42 miles
Answer:
84 feet
Step-by-step explanation:
Let the feet be A
1 foot = 0.33 yard
A feet = 28 yards
Cross multiply
A x 0.33 = 28 x 1
Divide both sides by 0.33
A x 0.33/0.33 = 28/0.33
A = 84.84
A = 84 feet
Therefore, there are 84 feet in 28 yards
Answer:
y = 3x + 7.
Step-by-step explanation:
The slope = 6/2 = 3
y-intercept = 7.
Answer:
20
Step-by-step explanation:
First we start off with the Pizza ($13)
Then we add our first 2 toppings to our pizza ($2 + $2 = $4)
And then we add our last 3 toppings to our pizza ($1 + $1 + $1 = $3)
Now we can add all of our costs up to get our answer
$13 + $4 + $3 = 20$
Therefore the cost for this Pizza is $20
